Firearm.



L. H. COBB.

FIREARM.

APPLICATION FILED JULY 3, 1909.

1,046,268, v Patented Dec. 3, 1912.

I is W n V h z' 7265565. [nae n for gflW [92724217256055 1/0 forneyUNITED STATES PATENT @FFEUE.

LYIVIAN H. COBB, OF FITCHBURG, MASSACHUSETTS, ASSIGNOB TO MARY ELIZABETHJOHNSON, TRUSTEE.

FIREARM.

citizen of the United States, residing at Fitchburg, in the county ofWorcester and Commonwealth of Massachusetts, have invented a new anduseful Improvement in Firearms, of which the following is aspecification, accompanied by drawings forming a part of the same, inwhich- Figure 1 represents a side View of arevolver embodying my presentinventlon, with the sides of the handle removed. Fig. 2 is a side viewof the handle and hammer of a revolver, with the sides of the handleremoved, showing the hammer in a cooked position. Fig. 3 is a detachedvlew of the hammer spring and adjustable plate toreceive the thrust ofthe spring. Fig. 4 1s a detached viewof the thrust plate. Fig. 5 is asectional view of the same on the line 5-5, Fig. 4. Fig. 6 is a centralsectional view of the cup shaped washer 10.

Similar characters refer to simllar parts in the difierent figures.

My present invention relates to means for employing a spiral spring forthe hammer spring of a firearm, with an adnistable abutment plate toreceive the pressure of the spring, and it has for its object to providemeans for retaining the spring in a compressed position to facilitateits removal from the firearm; and I accomplish this object by means ofthe construction and arrangement of parts as hereinafter described andpointed out in the annexed claims.

Referring to the accompanying drawings 1 denotes that portion of theframework of a revolver forming the handle.

2 is the hammer, and 3 is the hammer spring consisting of a spiralspring carried upona thrust pin 4 having its end 5 resting in a smallrecess formed in the rear side of the hammer, and having its oppositeend 6 passing through an opening 4 in an abutment plate 7 held in afixed position in the frame of a firearm in any suitable manner.

In the present instance the abutment plate 7 has its opposite endsadapted to engage notches 8, 8, in the frame of the firearm, by whichthe abutment plate is held in a fixed position to receive the thrust ofthe hammer spring 3. One end of the hammer spring 3 bears against ashoulder 9 on the thrust Specification of Letters Patent.

Application filed July 3, 1909.

Patented Dec. 3, 1912.

Serial No. 505,929.

pin 4, and the opposite end is received in a cup shaped washer 10 whichbears against the abutment plate 7. The abutment plate 7 is providedwith a circular opening 4 and a short slot 11 communicating with theopening 4. The opening 4 is of the proper sue to receive the bodyportion of the thrust pin 4 and the short slot 11- is of less width thanthe diameter of the opening 4 and adapted to receive a neck 12. When thehammer 2 is raised in a cocked position, as shown in Fig. 2, the hammerspring 3 is compressed and the thrust pin 4 is pushed through theopening 4 in the abutment plate 7. If the end 6 of-the thrust pin bethen pushed in the direction of the arrow 13, Fig. 2, the neck 12 willbe carried into the contracted slot 11 by which the thrust pin will beheld from longitudinal movement. By returning the hammer to its normalposition as shown in Fig. 1, the thrust pin 4 will be held fromfollowing the hammer and the hammer spring 3 will be held in acompressed position allowing the thrust pin 4, the hammer spring 3, andthe abutment plate 7, to be removed as a single piece.

In order to bring the hammer spring 3 into act-ion, when the parts areagain replaced, the end 6 of the thrust pin is pushed in the directionopposite to that shown by the arrow 13, causing the pin 4 to be raisedinto the circular opening 4 within which the thrust pin is capable oflongitudinal movement.

In order to prevent the thrust pin from being accidentally displacedfrom the circular opening 4 the side of the abutment plate 7 next thecup shaped washer 10 is counterbored to form a recess 14, Figs. 4 and 5,said counterbore having a curved bottom to fit the curved surface 15 ofthe cup shaped washer 10. Then the cup shaped washer 10 is inserted inthe recess 14 it will be held therein by friction and prevent thedisplacement of the thrust pin 4 in the abutment plate 7. A pressureupon the end 6 of the thrust pin in the direction of the arrow 13,however, will be sufiicient to dislodge the cup shaped washer from therecess 14 when the hammer is cooked, and allow the neck 12 to be pushedinto the contracted slot 11.

I claim,

1. A firearm having a hammer pivoted to the frame, a thrust pin with oneend engaging the rear side of the hammer, a hammer spring arranged toactuate said thrust pln, an abutment plate for said spring removablyheld in the frame of the firearm, said plate being provided withmeansfor holding said thrust pin from longitudlnal movement.

2. A firearm having a hammer pivoted to the frame, a thrust pin with oneend engaging the rear side of said hammer, a spiral hammer springsurrounding said pin and arranged to actuate the same, an abutment platefor said spring removablyheld in the frame of the firearm, and means fordetachably connecting said thrust pin and said plate whereby said pin isheld from longitudinal movement in either direction.

3. A firearm having a hammer pivoted to the frame, a thrust pin with oneend engaging the rear side of said hammer, a spiral hammer springsurrounding said pin and with one end engaging the same, an abutmentplate for said spring removably held in the frame of the firearm andhaving an opening for the passage of said pin, said plate having meansfor engaging said'pin' when said hammer is cooked and hold said, springcompressed when said hammer is in its normal position.

4c. In a firearm, a hammer, a thrust pin,

an abutment plate having anopening for the longituidnal movement of saidthrust pin and a slot communicating with said opening, a spiral hammeractuating spring inclosing said thrust pin between said abutment plateand a shoulder on said thrust pin, said thrust pin having a neck adaptedto enter said slot and hold the pin from longitudinal movement.

5. In a firearm, a hammer, a-hammer spring, a thrust pin and an abutmentplate having an opening for the thrust pin,a slot communicating withsaid opening, and a recess concentric with said opening.

6. In a firearm, a hammer, a thrust pin, a spiral spring inclosing saidthrust pin, an abutment plate having an opening for the longitudinalmovement of said-thrust pin,

a concentric recess, a slot communicating with said opening, said thrustpin having a "50 reduced portion adapted to enter said slot, and a cupshaped Washer inclosing the end of the spiral spring and engaging saidrecess.

Dated this 28th day of June 1909.

LYMAN it 00313. v

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G.

